const assert = require('assert');
const fs = require('fs');
const { execSync } = require('child_process');
const path = require('path');

describe('integration: special commands', () => {
  const distCcsPath = path.join(__dirname, '..', '..', 'dist', 'ccs.js');
  const srcCcsPath = path.join(__dirname, '..', '..', 'src', 'ccs.ts');

  function buildCliCommand(args = '') {
    if (fs.existsSync(distCcsPath)) {
      return `node "${distCcsPath}" ${args}`;
    }

    // Some tests rebuild or clean dist during the same Bun run.
    return `bun "${srcCcsPath}" ${args}`;
  }

  it('shows version with --version', () => {
    const output = execSync(buildCliCommand('--version'), { encoding: 'utf8' });
    assert(output.includes('CCS (Claude Code Switch)'));
    assert(/v\d+\.\d+\.\d+/.test(output));
  });

  it('shows version with -v', () => {
    const output = execSync(buildCliCommand('-v'), { encoding: 'utf8' });
    assert(/v\d+\.\d+\.\d+/.test(output));
  });

  it('shows help with --help', function() {
    // Note: Requires claude installation, so we just test that it doesn't crash
    try {
      const output = execSync(buildCliCommand('--help'), {
        encoding: 'utf8',
        stdio: ['ignore', 'pipe', 'ignore']
      });
      // If we get here, claude was found and help was shown
    } catch (e) {
      // Expected if claude is not installed
      assert(e.message.includes('Claude CLI not found') || e.status === 1);
    }
  });

  it('handles --install command', () => {
    const output = execSync(buildCliCommand('--install'), { encoding: 'utf8' });
    assert(output.includes('Feature not available'));
    assert(output.includes('under development'));
    assert(output.includes('.claude/ integration testing'));
  });

  it('handles --uninstall command', () => {
    const output = execSync(buildCliCommand('--uninstall'), { encoding: 'utf8' });
    assert(output.includes('Uninstalling CCS'));
    assert(output.includes('[OK] Uninstall complete!') || output.includes('Nothing to uninstall'));
  });

  describe('ccs update command flags', () => {
    it.skip('parses --force flag without error', function() { // Skip: requires network/child process
      // Note: This will fail at update check (no network in test), but proves flag parsing works
      try {
        execSync(buildCliCommand('update --force'), {
          encoding: 'utf8',
          stdio: ['ignore', 'pipe', 'pipe'],
          timeout: 5000
        });
      } catch (e) {
        // Expected: either network error or success message
        // NOT expected: "unknown flag" error
        assert(!e.stderr?.includes('unknown'));
        assert(!e.stderr?.includes('Invalid'));
      }
    });

    it.skip('parses --beta flag without error', function() { // Skip: requires network/child process
      try {
        execSync(buildCliCommand('update --beta'), {
          encoding: 'utf8',
          stdio: ['ignore', 'pipe', 'pipe'],
          timeout: 5000
        });
      } catch (e) {
        assert(!e.stderr?.includes('unknown'));
        assert(!e.stderr?.includes('Invalid'));
      }
    });

    it.skip('parses combined --force --beta flags', function() { // Skip: requires network/child process
      try {
        execSync(buildCliCommand('update --force --beta'), {
          encoding: 'utf8',
          stdio: ['ignore', 'pipe', 'pipe'],
          timeout: 5000
        });
      } catch (e) {
        assert(!e.stderr?.includes('unknown'));
        assert(!e.stderr?.includes('Invalid'));
      }
    });

    it.skip('shows appropriate error for direct install with --beta', function() { // Skip: requires network/child process
      // Test direct install rejection of --beta flag
      try {
        execSync(buildCliCommand('update --beta'), {
          encoding: 'utf8',
          stdio: ['ignore', 'pipe', 'pipe'],
          timeout: 5000
        });
      } catch (e) {
        // Check both stdout and stderr since ccs uses console.log for error messages
        const output = (e.stdout?.toString() || '') + (e.stderr?.toString() || '');

        // Should show beta not supported error for direct install
        // or network error if check passes first
        const hasBetaError = output.includes('requires npm installation') ||
                           output.includes('beta not supported');
        const hasNetworkError = output.includes('network') ||
                              output.includes('ECONNRESET') ||
                              output.includes('timeout');

        // Either is acceptable - beta error or network error
        assert(hasBetaError || hasNetworkError, `Expected beta or network error, got: ${output}`);
      }
    });
  });
});